diff options
Diffstat (limited to 'libcpp/lex.c')
| -rw-r--r-- | libcpp/lex.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/libcpp/lex.c b/libcpp/lex.c index c7296a110b6..5758e580c2b 100644 --- a/libcpp/lex.c +++ b/libcpp/lex.c @@ -450,15 +450,33 @@ search_line_sse42 (const uchar *s, const uchar *end) s = (const uchar *)((si + 16) & -16); } - /* Main loop, processing 16 bytes at a time. By doing the whole loop - in inline assembly, we can make proper use of the flags set. */ - __asm ( "sub $16, %1\n" - " .balign 16\n" + /* Main loop, processing 16 bytes at a time. */ +#ifdef __GCC_ASM_FLAG_OUTPUTS__ + while (1) + { + char f; + + /* By using inline assembly instead of the builtin, + we can use the result, as well as the flags set. */ + __asm ("%vpcmpestri\t$0, %2, %3" + : "=c"(index), "=@ccc"(f) + : "m"(*s), "x"(search), "a"(4), "d"(16)); + if (f) + break; + + s += 16; + } +#else + s -= 16; + /* By doing the whole loop in inline assembly, + we can make proper use of the flags set. */ + __asm ( ".balign 16\n" "0: add $16, %1\n" - " %vpcmpestri $0, (%1), %2\n" + " %vpcmpestri\t$0, (%1), %2\n" " jnc 0b" : "=&c"(index), "+r"(s) : "x"(search), "a"(4), "d"(16)); +#endif found: return s + index; |